I have just purchased an MPK-TRB and one HVL-M20...I know that this light wont give me a full spectrum cavern video... so I need either another HVL-M20 or at least a 20 to 30 watt Halogen or at least a comparible LED set up. I would like it to match the setup I have so first option is the Sony HVL if anybody has one. Good diving everybody!